Sharp KB-6021MS Service Manual page 21

Pin No. Signal I/O
27 COM0 OUT
28 VL3 IN
29 - 3 P27- P25 OUT
32 SEG20 OUT
33 P23 IN
34 P22 IN
35 P2 IN
36 P20 IN
37 P7 OUT
38 P6 OUT
39 P5 OUT
40 P4 OUT
4 P3 OUT
42 P2 OUT
43 P OUT
44 P0 OUT
45 P07 OUT
46 P06 OUT
Common data signal.
Connected to LCD signal C4.
Connected VC (+5V).
Terminal not used.
Segment data signal.
Connected to LCD segment S24.
Signal coming from touch key.
When any one of J-4 line keys on key matrix is touched, a corresponding signal from P0-
P7 will be input into P23. When no key is touched, the signal is held at "L" level.
Signal similar to P23.
When any one of J-3 line keys on key matrix is touched, a corresponding signal will be
input into P22.
Signal similar to P23.
When any one of J-2 line keys on key matrix is touched, a corresponding signal will be
input into P2.
Signal similar to P23.
When any one of J- line keys on key matrix is touched, a corresponding signal will be
input into P20.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-2 line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J- line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-0 line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-9 line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-8 line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-7 line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-6 line key on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-5 line key on matrix is touched.
Fan motor (Drawer) driving signal.
To turn on and off relay(RY4).
"H" level: During fan motor ON.
"L" level: During fan motor OFF.
Stirrer motor driving signal.
To turn on and off relay(RY3).
"H" level: During fan motor ON.
"L" level: During fan motor OFF.
2
Description
ON
ON
KB-6021MS
KB-6021MK
KB-6021MW
H: +5V
L: GND
OFF
H: +5V
L: GND
OFF